Question: What's the most "practical" fighting style for someone in law enforcement?

Background: Well fit 30 year-old former Marine, 6'2 215#s, gearing up for Sheriff's Academy and career in law enforcement.

Current opinion: Due to the nature of the job, I anticipate that most problems that occur will be when trying to "cuff" an unwilling individual, so I would think that the "goal" would be to physically subdue the perp if need be until the proper metallic/plastic restraints can be applied. Current/former law enforcement professionals with any relevant data/experience in this area are more then welcome to sound off as I would greatly appreciate the input. Thanks in advance.